Synthesis and evaluation of lightweight concrete research relevant to the AASHTO LRFD bridge design specifications : identification of articles for further evaluation and potential revision.
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2012-11-01
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Edition:Final report.
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures;NTL-HIGHWAY/ROAD TRANSPORTATION-Design;
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Abstract:Much of the fundamental basis for the current lightweight concrete provisions in the AASHTO LRFD Bridge
Design Specifications is based on research of lightweight concrete (LWC) from the 1960s. The LWC that was
part of this research used traditional mixes of coarse aggregate, fine aggregate, portland cement, and water.
Broad-based advancement in concrete technology over the past 50 years has given rise to significant
advancements in concrete mechanical and durability performance. The purpose of this document is to give
members of AASHTO Subcommittee on Bridges and Structures T-10 the opportunity to begin considering
whether revisions to provisions related to LWC within Chapter 5 of the AASHTO LRFD Specifications are
warranted. Five specific topics are described in this document where recent LWC research may be sufficient to
warrant consideration of a revision to the AASHTO LRFD Specifications. For each topic, the current articles in
AASHTO LRFD are described, some of the recent research efforts are mentioned, and then potential revisions
are outlined. This document served as supplemental information in support of the discussion that occurred at the
March 2012 T-10 meeting in Chicago, Illinois.
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